Abstract: Results of Raman scattering experiments carried out on fluid n-H[sub 2] at room temperature at pressures up to 4.6 GPa are reported. Observed frequency shifts of rotational and vibrational lines are consistent with those observed at lower densities. Line broadening of the S[sub 0](0) and S[sub 0](1) rotational lines and the Q[sub 1](1) and Q[sub 1](2) vibrational lines exhibits a nonlinear density dependence. The linewidth of the Q[sub 1](1) line saturates at around 2.2 GPa, the pressure at which frequency degeneracy of the Q[sub 1](1) and the Q[sub 1](2) lines occurs. Results are compared to the impact theory of Fiutak and Van Kranendonk.

Rct Date:(Received 20 July 1987)
PACS:Type: E-Experimental. Year: 88. Class nos. 33.20.Fb; 33.70.Jg; 07.35.&k
Country:US-United States
CPM no.: Microfilm no(s): 8804D1612 Abstract no(s): 2.01696
DOE Info:640302
Keywords:Number: 10. HYDROGEN :T1; LIGHT SCATTERING; RAMAN SPECTRA :Q1; PRESSURE DEPENDENCE; VERY HIGH PRESSURE; SPECTRAL SHIFT; ROTATIONAL STATES; LEVEL WIDTHS; VERY HIGH PRESSURE; MEDIUM TEMPERATURE